Adjustable chair seat



July 15, 1958 R. cs. STALLARD ADJUSTABLE CHAIR SEAT Filed April 12, 1956.zauazaaa 'IIII IIIIIIII"IIA INVENTOR asi'a [lo '7- d ATTORNEY$ UnitedStates Patent ADJUSTABLE CHAIR SEAT Ross G. Stallard, Vallejo, Calif.

Application April 12, 1956, Serial No. 577,785

1 Uaim. (Cl. 15588) The present invention relates to adjustable chairseats, and more particularly, to chair seats which can be adjustedwithout altering the normal appearance of the chair.

The primary object of the invention is to provide an adjustable chairseat of the type adapted for interim use between high chairs andstandard size chairs.

Another object of the invention is to provide an adjustable seat forchairs which can be adjusted without the use of tools of any kind.

A further object of the invention is to provide an adjustable chair seatutilizing a cam lock to hold the seat in adjusted position againstdisplacement.

A still further object of the invention is to provide an adjustable seatfor chairs which is inexpensive to manufacture, easy to use and durablein service.

Other objects and advantages will become apparent in the followingspecification when considered in the light of the attached drawings, inwhich:

Figure 1 is a side elevation of the invention.

Figure 2 is a transverse cross-section taken along the line 2-2 ofFigure 1, looking in the direction of the arrows.

Figure 3 is an enlarged fragmentary vertical crosssection taken alongthe line 33 of Figure 2, looking in the direction of the arrows.

Figure 4 is a horizontal cross-section of a fragment of the structuretaken along the line 44 of Figure 3, looking in the direction of thearrows. V

Figure 5 is a view similar to Figure 3 illustrating a modified form ofthe invention.

Figure 6 is a fragmentary side elevation illustrating the locking teethon the arm shown in the modified form of the invention in Figure 5.

Referring now to the drawings in detail wherein like reference numeralsindicate like parts throughout the several figures, the referencenumeral 10 indicates generally a chair constructed in accordance withthe invention. The chair 10 is formed of tubular material and consistsof a pair of forward legs 11 and 12, horizontal frame members 13 and 14,a pair of rear legs 15 and 16, a forward cross-bar 17, and a rearcross-bar 18. A back generally indicated at 19 consists of a pair ofupright members 20 and 21 secured to the horizontal members 13 and 14.The upright members 20 and 21 are connected at their upper ends by ahorizontal member 22 and carry a back panel 23 therebetween. Thehorizontal frame members 13, 14, the forward cross-bar 17 and the rearcross-bar 18 together constitute a framework from which the legs 11, 12,15 and 16 depend.

A seat structure, generally indicated at 24, consists of a pair ofparallel horizontal members 25 and 26 joined at their forward ends bymeans of a cross-bar 27. The rear 2,843,182 Patented July 15, 1958 "iceterminal end portion of the horizontal member 25 is formed into a loop28 loosely engaged over the upright member 20, as best illustrated inFigure 2. The terminal rear end portion of the horizontal bar 26 isformed into a loop 29 loosely engaged over the upright frame member 21,also as best illustrated in Figure 2.

A downwardly and rearwardly curving cam bar 30 is secured to the rearend portion of each of the horizontal members 25 and 26 and terminatesin a pair of arcuate feet 31. A rubber pad 32 is secured to the innersurface of the feet 31 in position to engage the upright bars 20 and 21.A seat panel 33 is secured to the horizontal bars 25, 26 and 27 toprovide a seating surface. Downward pressure on the seat pad 33 causesthe feet 31 to engage and lock to the bars 20 and 21 holding seatstructure 24 in adjusted position with relation to the back 19.

Obviously, the seat 24 can be adjusted with relation to the back 19 bylifting the outer end freeing the feet 31 from the upright frames 20 and21 permitting the loops 28 and 29 to be slid thereon.

Referring now to the modification illustrated in Figures 5 and 6, theback structure, generally indicated at 19a, has upright members, one ofwhich is illustrated at 21a, a seat structure, generally indicated at24a, and having horizontal member 26a, loop 29a, and cam bar 30a. Theupright member 21a is provided with a plurality of serrated teeth 34 onits forward surface in position to be contacted by the terminal rearportion of the cam bar 3011.

The terminal rear portion of the cam bar 30a is like-' wise providedwith a plurality of serrated teeth 35 which are adapted to cooperatewith the serrated teeth 34 to lock the seat 24a in adjusted position onthe back 19a.

It can readily be seen that the seat provided by either of the forms ofthe invention disclosed above will accommodate a child during the yearsof growth separating the high chair and conventionally sized chair ages.

Having thus described the preferred embodiments of the invention, itshould be understood that numerous structural modifications andadaptations may be: resorted to in addition to those disclosed withoutdeparting from the scope of the appended claim,

What is claimed is:

A chair comprising a plurality of legs, a framework securing said legstogether, a back extending upwardly from said framework, said backincluding a pair of spaced upright tubular members connected at theirupper end by a horizontal member, a seat structure including a pair ofrigid integral loops loosely fitting respectively over said tubularmembers, a pair of downwardly and rearwardly curving cam bars integrallycarried by said seat structure in a position below said loops and infixed relation thereto, an arcuate foot portion formed integrally on thelower end portion of each of said cam bars, said foot portions having asurface bearing against said tubular members to releasably lock saidseat structure in a vertically adjusted position, and a resilient padfixedly secured to said surface of each of said foot portions.

References Cited in the file of this patent UNITED STATES PATENTS1,039,647 Carter Sept. 24, 1912 1,228,249 Sautier May 29, 1917 FOREIGNPATENTS 595,508 Great Britain Dec. 8, 1947

